We are constantly attracting people into our lives.  Not all people are meant to stay, especially if you are experiencing change in your life.  Those people may no longer be at the same place as where you are.  We cannot expect people to be who we want them to be.  We will become very frustrated with the relationship.  They have to want to change for themselves.  Some people will change and some will not.  Either way, we must accept them for who they are.